Palatine process of the maxilla

Palatine process of maxilla
Inferior surface of maxilla. The bony palate and alveolar arch. (Palatine process labeled at bottom right.)
Inferior surface of maxilla.
Details
Identifiers
Latin	processus palatinus ossis maxillae, processus palatinus maxillae
Dorlands /Elsevier	p_34/12667562
TA	A02.1.12.029
FMA	52896
Anatomical terms of bone []

In human anatomy of the mouth, the palatine process of the maxilla (palatal process), is a thick, horizontal process of the maxilla. It forms the anterior three quarters of the hard palate, the horizontal plate of the palatine bone making up the rest.

It is perforated by numerous foramina for the passage of the nutrient vessels; is channelled at the back part of its lateral border by a groove, sometimes a canal, for the transmission of the descending palatine vessels and the anterior palatine nerve from the spheno-palatine ganglion; and presents little depressions for the lodgement of the palatine glands.

When the two maxillae are articulated, a funnel-shaped opening, the incisive foramen, is seen in the middle line, immediately behind the incisor teeth.

In this opening the orifices of two lateral canals are visible; they are named the incisive canals or foramina of Stenson; through each of them passes the terminal branch of the descending palatine artery and the nasopalatine nerve.

On the under surface of the palatine process, a delicate linear suture, well seen in young skulls, may sometimes be noticed extending laterally and forward on either side from the incisive foramen to the interval between the lateral incisor and the canine tooth.

The small part in front of this suture constitutes the premaxilla (os incisivum), which in most vertebrates forms an independent bone; it includes the whole thickness of the alveolus, the corresponding part of the floor of the nose and the anterior nasal spine, and contains the sockets of the incisor teeth.

The upper surface of the palatine process is concave from side to side, smooth, and forms the greater part of the floor of the nasal cavity. It presents, close to its medial margin, the upper orifice of the incisive canal.